Trans-4-(2-chlorophenoxy)-1-ethyl-3-pyrrolidinol and anti-depressant use thereof

ABSTRACT

Cis and trans-3-aryloxy-4-hydroxypyrrolidines and derivatives thereof having the formula: ##STR1## are disclosed wherein R 1  is hydrogen, loweralkyl, benzyloxycarbonyl and N-loweralkylcarbamoyl; R 2  is hydrogen, lower alkyl, cycloalkyl, phenylalkyl, benzyloxycarbonyl, carbamoyl, N-loweralkylcarbamoyl, N-diloweralkylcarbamoyl and parafluorobenzoyl-lower-alkyl; Ar is phenyl, substituted phenyl, 1-naphthyl, 2-naphthyl, 1-indenyl and 2-indenyl and pharmaceutically acceptable acid addition and quaternary salts thereof. The compounds have antidepressant, antihypertensive and antiarrythmic activity in animals.

This application is a continuation, of application Ser. No. 128,691,filed Mar. 10, 1980 now abandoned.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention relates to certain novel cis and trans isomers of3-aryloxy-4-hydroxypyrrolidines and derivatives thereof which are usefulin treating depression, hypertension or heart arrythmias in animals,with compositions prepared therefrom.

2. Description of the Prior Art

Compounds of the present invention have not been available prior to thepresent invention. German Offenlegungsschrift No. 2,738,477 hasdisclosed certain trans-3-aryloxy-4-hydroxypyrrolidines and piperidineswhich have pertinence to the present invention but which disclosure issubsequent to the present invention. None of the compounds disclosed inthat reference are cis isomers. Certain of the compounds of the presentinvention also differ in having substitution of alkyl, phenylalkyl andcycloalkyl on pyrrolidinyl nitrogen.

SUMMARY OF INVENTION

The present invention provides novel cis and trans isomers of3-aryloxy-4-hydroxypyrrolidines and derivatives thereof which haveimportant pharmacological activity. The compounds of the invention arerepresented by the following structure formula: ##STR2## wherein;

R₁ represents hydrogen, loweralkyl, benzoyloxycarbonyl, andN-loweralkylcarbamoyl,

R₂ represents hydrogen, loweralkyl, cycloalkyl, phenylalkyl,benzyloxycarbonyl, carbamoyl, N-loweralkylcarbamoyl,N-di-loweralkylcarbamoyl and parafluorobenzoylloweralkyl,

Ar=phenyl, substituted phenyl, 1-naphthyl, 2-naphthyl, 1-indenyl and2-indenyl, and the pharmaceutically acceptable acid addition andquaternary salts thereof. The compounds have cis or trans configuration.

The compounds of the present invention have antidepressant, hypotensiveand cardiovascular activity in animals.

Antidepressant activity was shown to be present by the procedure givenby Englehardt, E. L. et al., J. Med. Chem. 11 (2:325 (1968) wherein thenovel compounds of the present invention were administered to miceintraperitoneally and the effectiveness of the compounds in blocking thedepressant effects which are induced in mice by intravenousadministration of 2-oxo-3-isobutyl-9,10,dimethoxy-1,2,3,4,6,7-hexahydro-11bh-benzo[a]quinolizine (tetrabenazine)was determined.

Compounds of the invention for which pronounced antidepressant activitywas observed have the formula: ##STR3## wherein R₂ is hydrogen,lower-alkyl or phenylalkyl, and Ar is phenyl or substituted phenyl.

Compounds preferred for their antidepressant activity have the formula:##STR4## Illustrative of the antidepressant activity of compounds ofFormula Ia are the effective dosages determined by the foregoinganti-tetrabenazine test.

    ______________________________________                                        Compound    Antitetrabenazine (Mice)                                          Example     ED.sub.50 (mg/kg)                                                 ______________________________________                                         3          3.7                                                               46          3.5                                                               49          4.8                                                               48          2.8                                                               ______________________________________                                    

The action of certain compounds disclosed in the present invention incounteracting cardiac arrhythmia is demonstrated by the followingprocedure. The procedure is carried out under barbiturate anesthesiausing adult mongrel dogs of either sex weighing from 8 to 14 kg. A GrassModel 7 polygraph was used for recording femoral arterial blood pressure(Statham P23AC Transducer) and the electrocardiogram (Grass 7P4Preamplifier). Ouabian was given intravenously in an initial dose of40γ/kg in a second dose of 20γ/kg, given 30 minutes after the firstdose, and in subsequent doses of 10γ/kg which were repeated at 15 minuteintervals as required for producing cardiac arrhythmias that persistedfor at least 15 minutes. When the arrhythmias were established the testcompounds were administered by infusion (Harvard Model 942 InfusionPump) into a femoral vein at a rate of 1 mg/kg/min. Concentrations ofcompounds were adjusted according to the weight of the dog to allow avolume infusion of 1 ml/min. Compounds that are considered to be activeas antiarrhythmic agents cause reversion to sinus rhythm which ismaintained for at least 60 minutes.

Compounds of the invention for which pronounced antiarrhythmic activitywas observed have the formula: ##STR5## wherein R₂ is hydrogen and loweralkyl, and Ar is 1 and 2-naphthyl and 4 and 5-indenyl.

The compound of Example 55 represents a preferred compound exhibitingexceptional antharrhythmic activity at a minimum effective dose of 10.7mg/kg using the foregoing procedure.

It is accordingly an object of the present invention to provide cis andtrans-3-aryloxy-4-hydroxypyrrolidines and derivatives thereof andmethods of making same, which have a high degree of antidepressantactivity.

Another object is to provide cis andtrans-3-aryloxy-4-hydroxypyrrolidines and derivatives thereof which haveantiarrhythmic and anti-hypertensive activities in animals.

A still further object is to provide methods of using the cis andtrans-3-aryloxy-4-hydroxypyrrolidines as antidepressants, hypotensiveagents and antiarrythmic agents in the treatment of living animals,especially mammalian subjects in need of treatment. Additional objectswill be apparent to one skilled in the art and still other objects willbecome apparent hereinafter.

DETAILED DESCRIPTION OF THE INVENTION

The present invention encompasses the novel cis and trans isomers of3-aryloxy-4-hydroxypyrrolidines and derivatives thereof as set forthhereinabove in Formula I and the definitions therewith as composition ofmatter and the utilization of these novel compounds in living animalsfor their pharmacological effect as set forth hereinabove and below.

The term "loweralkyl" as used in the specification and claims includesstraight and branched chain radicals of up to eight carbon atomsinclusive and is exemplified by such groups as methyl, ethyl, propyl,isopropyl, butyl isobutyl, tertiary butyl, amyl, isoamyl, hexyl, heptyl,octyl and the like.

The term "substituted phenyl" as used in the specification and claimsincludes phenyl substituted in one to 3 positions by one or moreradicals selected from halogen, O-loweralkyl, --NHC(O)CH₃, CF₃,--C(O)CH₃, --CH₂ CH═CH₂, alkyl, hydroxy, --OCH₂ phenyl, and --C(O)NH₂.

By "cycloalkyl" is meant cycloalkyl radicals having 1 to 9 carbon atomsand includes such radicals as cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl and the like.

Representative of phenylalkyl radicals are benzyl (phenylmethyl),α-methylbenzyl, phenylethyl, phenylpropyl, phenylbutyl and the like.

The starting materials used in preparing the novel trans isomercompounds of Formula I are 1-phenylalkyl-3,4-epoxypyrrolidines such as1-benzyl-3,4-epoxypyrrolidine; 1-alkyl-3,4-epoxypyrrolidines such as1-ethyl-3,4-epoxypyrrolidine; and 1-cycloalkyl-3,4-epoxypyrrolidinessuch as 1-cyclohexyl-3,4-epoxypyrrolidine.

Preparation of these 1-substituted epoxypyrrolidines is represented bythe following equation: ##STR6## wherein R is loweralkyl, phenylalkyl orcycloalkyl. Generally, the chlorination step is accomplished in 2-6 hrsand the intermediate III need not be isolated. Crude epoxypyrrolidinesare obtained by solvent extraction and converted to crystalline saltsuch as oxalates. Pure free base of the epoxypyrrolidines may beobtained from the oxalate salt by partitioning between 5% aqueous sodiumcarbonate and methylene chloride and thereafter drying over anhydroussodium sulfate and evaporating the methylene chloride. The pyrrolinesused in these starting preparations are prepared according to theprocedure of U.S. Pat. No. 3,691,198 and the procedure for thepreparation of 1-cyclohexyl-Δ³ -pyrroline is given in Preparation 1.

Preparation of the epoxypyrrolidines used to prepare the trans isomersof Formula I are given in Preparations 2-4.

The starting materials used in preparing the cis isomers of compounds ofFormula I was cis-benzyl-3,4-pyrrolidinediol as given in Preparation 5.Cis-3,4-pyrrolidinediols were first prepared by A. J. Hill et al., J.Amer. Chem. Soc. 76, 3548 (1954).

Preparation 1 1-Cyclohexyl-Δ³ -pyrroline

A solution of 5.19 kg (52.3 moles) of cyclohexylamine in 4.0 liters ofbenzene was heated to mild reflux (92° C.) and then the heatingdiscontinued. To the solution was added, dropwise, 1,635 g (13.1 moles)of 1,4-dichlorobutane at a rate sufficient to maintain gentle reflux, 3hours time being required. Heating was continued and the reactants wereheated at reflux temperature for 18 hours. The mixture was cooled toabout 50° C. and filtered to remove the hydrochloride salt. Carbondioxide was bubbled into the filtrate to precipitate excess aminecarbonate salt which was removed by filtration. Solvent was removed fromthe filtrate by distillation under reduced pressure and the reddishfluid residue slightly contaminated with benzene weighed 1,506 g. (76%yield).

Preparation 2 1-Benzyl-3,4-epoxypyrrolidine Oxalate

A mixture of 31.8 g. (0.20 mole) of N-benzyl-Δ³ -pyrroline, 25 l. ofconcentrated hydrochloric acid and 300 ml. of water was treated with astream of chlorine gas for 2 hr. The solution was filtered and thefiltrate was made basic with 20% sodium hydroxide. The basic solutionwas extracted with three 150 ml. portions of methylene chloride. Thecombined methylene chloride extracts were dried over magnesium sulfateand evaporated to give 48.5 g. of crude chlorohydrin as a dark oil. Thisoil was stirred with 200 ml. of 20% sodium hydroxide 0.5 hr., 700 l. ofwater was added, and the base was extracted with four 100-ml portions ofmethylene chloride. The combined methylene chloride extracts were driedover magnesium sulfate and concentrated to yield 34.9 g. (99%) of crudeepoxide as a dark oil. The oxalate salt was prepared in 81% yield.Recrystallization from 95% ethanol gave the salt as off-white needles,m.p. 148°-49°/d.

Analysis: Calculated for C₁₃ H₁₅ NO₅ : C, 58.86; H, 5.70; N, 5.28.Found: C, 58.55; H, 5.68; N, 5.25.

Preparation 3 1-Ethyl-3,4-epoxy-pyrrolidine Oxalate

A mixture of 61 g. (0.63 mole) of 1-ethylpyrroline, 50 ml. ofconcentrated aqueous hydrochloric acid and 600 ml. of water was treatedwith chlorine gas for 2.5 hr. The mixture was filtered through cottonand the filtrate was washed with two 100-ml. portions of methylenechloride. The aqueous layer was made basic with 20% sodium hydroxide,heated on a steam bath for 0.5 hr. and extracted with three 100-ml.portions of methylene chloride. The combined extracts were dried overanhydrous sodium sulfate and concentrated and the residue vacuumdistilled to give 39.4 g. (56%) of the epoxide as a clear oil (b.p.75°-90° @ 28 mm). The epoxide was converted to the oxalate and the saltwas recrystallized from absolute ethanol to give white needles, m.p.142°-4°d.

Analysis: Calculated for C₈ H₁₃ NO₅ : C, 47.29; H, 6.45; N, 6.89. Found:C, 47.12; H, 6.42; N, 6.82.

Preparation 4 1-Cyclohexyl-3,4-epoxypyrrolidine Oxalate

A solution of 151.3 g. (1.0 mole) of N-cyclohexyl-Δ³ -pyrrolidine, 100ml of concentrated hydrochloric acid and 1.8 liters of water was treatedwith a stream of chlorine gas until uptake ceased (˜6 hrs). The solutionwas washed with methylene chloride and the acidic solution was leftstanding overnight. The solution was then made basic with 50% sodiumhydroxide and extracted with methylene chloride. The combined extractswere concentrated to give 185 g of chlorohydrin as residue. The residuewas slowly poured into an ethanol solution containing 20% sodiumhydroxide. The mixture was stirred for 0.5 hr and then 3.5 liters ofwater was added. The mixture was extracted with methylene chloride andthe combined extracts were dried over anhydrous sodium sulfate andconcentrated to give 154 g. (92%) of amine epoxide. An NMR analysisindicates this residue is 86% epoxide and 14%3,4-dichloro-N-cyclohexylpyrrolidine. The residue was vacuum distilledto give the epoxide as a water-white liquid, b.p. 71° C. at 0.6 mm. Aportion of the liquid was converted to the oxalate to give a whitesolid, m.p. 155°-6°d when recrystallized from ethanol.

Analysis: Calculated for C₁₂ H₁₉ NO₅ : C, 56.02; H, 7.44; N, 5.44.Found: C, 56.05; H, 7.50; N, 5.34.

Preparation 5 1-Phenylmethyl-3,4-pyrrolidinediol Monohydrochloride cisIsomer

A mixture of 80 g. (0.32 mole) of meso-1,4-dibromo-2,3-dihydroxybutane,34 g. (0.32 mole) of benzylamine, 3 g. of potassium iodide and 140 g.(1.0 mole) of potassium carbonate in 250 ml of 95 ethanol was heated atreflux for 18 hr., then cooled and filtered. The filtrate wasconcentrated and the residue was washed with several portions of boilingethyl acetate. The extracts were combined, washed with a small amount ofwater, dried over anhydrous sodium sulfate and concentrated to give 30 gresidue representing a 48% yield of 1-phenylmethyl-3,4-pyrrolidinediolcis isomer. A portion was converted to the hydrochloride salt withhydrogen chloride in isopropyl alcohol and recrystallized from isopropylalcohol as off-white granules, m.p. 115.0°-116.5°.

Analysis: Calculated for C₁₁ H₁₆ ClNO₂ : C, 57.52; H, 7.02; N, 6.10.Found: C, 57.16; H, 6.91; N, 6.01.

Synthesis of trans-isomer compounds of Formula I which are part of thepresent invention and which also serve as reactants for the preparationof other compounds of the invention was started by reacting aryloxycompounds with appropriately 1-substituted-3,4-epoxypyrrolidines asexemplified by the following equation: ##STR7## wherein R₂ isphenylalkyl, alkyl and cycloalkyl, and Ar is as defined hereinabove.

Synthesis of cis isomers which are part of the present invention andwhich serve as reactants for other compounds of the invention wasstarted by reacting 1-benzyl-3,4-pyrrolidinediol cis isomer with Ar-Fcompounds according to the following formula: ##STR8## wherein Ar is asdefined hereinabove.

In preparing compounds having further variation under Formula I, thefollowing methods may be used for preparation of either trans or cisisomers. ##STR9##

To obtain the free base of a compound prepared as a salt, the salt ispartitioned between methylene chloride and 5% sodium hydroxide. Themethylene chloride layer is dried over sodium sulfate and concentratedto give the base as residue.

The novel compounds of the present invention and the methods for theirpreparation are exemplified more fully by the following illustrativeexamples, the scope of the invention is, however, not limited thereto.As will be readily identifiable from a consideration of the examples andthe foregoing outline, many of the compounds under the scope of FormulaI may be also considered as intermediates in the synthesis of othercompounds of Formula I.

EXAMPLE 1 Trans-4-phenoxy-1-phenylmethyl-3-pyrrolidinol

A mixture of 12.3 g. of 1-benzyl-3,4-epoxypyrrolidine, 13.2 g. of phenoland 3 drops of water was heated at 120° C. under nitrogen gas for 20 hr.The mixture was cooled and dissolved in 100 ml. ethyl ether. Theethereal solution was extracted with 2×50 ml. of 5% sodium hydroxide andthen washed with water. After being dried with anhydrous sodium sulfate,the solvent was evaporated and the residue weighed 14.3 g. Twocrystallizations from cyclohexane gave analytically pure product meltingat 101°-104° C. The yield was 24% of theory.

Analysis: Calculated for C₁₇ H₁₉ NO₂ : C, 75.81; H, 7.11; N, 5.20.Found: C, 75.71; H, 7.10; H, 5.38.

EXAMPLE 2 Trans-3-hydroxy-1-methyl-4-phenoxy-1-phenylmethylpyrrolidiniumIodide

A solution of 8.0 g. (56 mmol) of methyl iodide in 30 ml of dry ethylether was added dropwise to a stirred solution of 7.0 g. (26 mmol) oftrans-4-phenoxy-1-phenylmethyl-3-pyrrolidinol in 70 ml. of dry diethylether. The mixture was stirred for two days and then concentrated underreduced pressure. The 10.7 g. of crystalline residue was washed withtetrahydrofuran and dried, and gave 10.4 g. (97%) of white powder, m.p.122°-27° C.

Analysis: Calculated for C₁₈ H₂₂ INO₂ : C, 52.57; H, 5.39; N, 3.41.Found: C, 52.78; H, 5.45; N, 3.55.

EXAMPLE 3 Trans-1-methyl-4-phenoxy-3-pyrrolidinol

A solution of 9.3 g. (22.6 mmol) oftrans-3-hydroxy-1-methyl-4-phenoxy-1-phenylmethylpyrrolidinium iodide in200 ml. of absolute ethanol and 100 ml. of 190 ethanol was stirred atambient temperature for 0.5 hr. with 2.6 g. (11.3 mmol) of silver oxide.After 0.2 g. more silver oxide was added, the mixture was warmed to 45°C. and stirred for an additional 15 min. The mixture was separated byfiltration through Celite, and the volume of the filtrate was reduced to200 ml. This solution was treated with ca. 0.5 g. of 10% Pd/C catalystand was shaken with H₂ in the Parr reduction apparatus for 3 hr. Thesuspension was filtered through Celite and the filtrate was concentratedto give 4.3 g. of crystalline solid. This material, when recrystallizedfrom cyclohexane, gave 3.66 g. (84%) of off-white crystals, m.p.89.0°-90.0° C.

Analysis: Calculated for C₁₁ H₁₅ NO₂ : C, 68.37; H, 7.82; N, 7.25.Found: C, 68.11; H, 7.83; N, 7.22.

EXAMPLE 4 Trans-3-methoxy-4-phenoxy-1-phenylmethylpyrrolidine Oxalate

8.1 g. (0.03 mole) of trans-4-phenoxy-1-phenylmethyl-3-pyrrolidinol wasmixed with 0.72 g (0.03 mole) of sodium hydride (1.3 g of 55% in oil,washed with 3×10 ml diethyl ether) in 50 ml. of dimethylformamide andstirred until hydrogen evolution ceased. 4.3 g (0.03 mole) of methyliodide was added and the mixture was stirred for 18 hr. The reaction wasworked up by pouring into 400 ml of water and extracting with 3×100 mlof diethyl ether. The diethyl ether was evaporated, leaving 7.9 g ofresidue. Addition of petroleum ether caused precipitation of startingmaterial, which was removed by filtration. The residue after evaporationof the mother liquor was chromatographed on silica gel eluting theproduct with 10% acetone in benzene. The yield of pure product my NMRwas 5.0 g. (59%). A small amount was converted to the oxalate iniso-PrOH and recrystallized from i-PrOH; m.p. 122°-25° C.

Analysis: Calculated for C₂₀ H₂₃ NO₆ : C, 64.33; H, 6.21; N, 3.75.Found: C, 63.93; H, 6.21; N, 3.69.

EXAMPLE 5 Trans-3-methoxy-4-phenoxypyrrolidine Fumarate

A solution of 4.2 g. (0.015 mole) of3-methoxy-4-phenoxy-1-phenylmethylpyrrolidine in 70 ml. of ethanol wastreated with ca 0.2 g of Pd/C catalyst and shaken under hydrogen at 60°C. in the Parr apparatus for 3 hr. After cooling, the mixture wasfiltered and the solvent was evaporated. The 2.9 g (100%) of crudeproduct (good purity by NMR) was converted to the fumarate in isopropylalcohol. The pale yellow precipitate melted at 134°-136° C.

Analysis: Calculated for C₁₅ H₁₉ NO₆ : C, 58.25; H, 6.19; N, 4.53.Found: C, 58.15; H, 6.27; N, 4.46.

EXAMPLE 6 Trans-4-phenoxy-3-pyrrolidinol Fumarate

A solution of 14.8 g. of 1-benzyl-4-phenoxy-3-pyrrolidinol in 200 ml. ofethanol was treated with ca. 3 g. of 10% palladium-on-charcoal catalystand was shaken with hydrogen at 60° C. in the Parr reduction apparatusfor 5 hr. The suspension was cooled, filtered and the solvent evaporatedat reduced pressure. The residue was converted to the fumarate usingisopropyl alcohol. The yield of product, m.p. 158°-62° C. was 14.1 g(87%).

Analysis: Calculated for C₁₄ H₁₇ NO₆ : C, 56.95; H, 5.80; N, 4.74.Found: C, 56.91; H, 5.97; N, 4.78.

EXAMPLE 7Trans-1-(4-fluorophenyl)-3-(3-hydroxy-4-phenoxy-1-pyrrolidinyl)-1-propanone

A mixture of 3.6 g. (0.02 mole) of 4-phenoxy-3-pyrrolidinol, 5 g.(0.0215 mole) of β-dimethylamino-p-fluoropropiophenone hydrochloride, 10g. of potassium carbonate and 50 ml. of dimethylformamide was heatedwith stirring at 70° C. for 6 hr. while nitrogen gas was bubbled throughthe reaction mixture. The mixture was poured into water and extractedtwice with benzene. The combined extracts were dried over anhydroussodium sulfate and concentrated to give 6.1 g. of an oil as residue. Theoil was chromatographed on 130 g. of silica gel. The desired compoundwas eluted with 20% acetone in benzene and 2.6 g. (39%) of an oil whichgradually crystallized upon standing was obtained. This solid wasrecrystallized from petroleum ether diethylether to yield a white solid,m.p. 77°-80° C.

Analysis: Calculated for C₁₉ H₂₀ FNO₃ : C, 69.28; H, 6.12; N, 4.25.Found: C, 69.43; H, 6.23; N, 4.18.

EXAMPLE 8 Trans-4-(4-chlorophenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 12.3 g. of 1-benzyl-3,4-epoxypyrrolidine, 18.0 g. ofp-chlorophenol and 3 drops of water was heated at 120° C. under nitrogengas for 20 hr. The mixture was cooled and dissolved in 100 ml. diethylether. The ethereal solution was extracted with 2×50 ml. 5% sodiumhydroxide and then washed with water. After being dried with anhydroussodium sulfate, the solvent was evaporated and the residue weighed 14.3g. Two crystallizations from cyclohexane gave 4.7 g (29%) ofanalytically pure product which melted at 101°-104° C.

Analysis: Calculated for C₁₇ H₁₈ ClNO₂ : C, 67.21; H, 5.97; N, 4.61.Found: C, 67.35; H, 6.10; N, 4.69.

EXAMPLE 9Trans-3-(4-chlorophenoxy-4-{phenylmethyl[carbonylbis(oxy)]}-1-pyrrolidinecarboxylic acid phenylmethyl ester

A solution of 14.0 g. (0.046 mole) oftrans-4-(4-chlorophenoxy)-1-phenylmethyl-3-pyrrolidinol and 5 g. (0.05mole) of triethylamine in 200 ml. of benzene was added dropwise to acold (15° C.) solution of 30.0 g. (0.175 mole) of benzylchloroformate in100 ml. of benzene. The mixture was allowed to warm to room temperatureand stirred over night. The precipitate was removed by filtration anddiscarded and the filtrate was concentrated and the residue heated underhigh vacuum to remove excess reactants and by-products. The resultinggum was chromatographed on silica gel, eluting the desired product with20% acetone in benzene. 5 g. of product was obtained after evaporation.

EXAMPLE 10 Trans-4-(4-chlorophenoxy)-3-pyrrolidinol Hydrobromide

A solution of 5 g. of3-(4-chlorophenoxy)-4-{phenylmethyl[carbonylbis(oxy)]}-1-pyrrolidinecarboxylicacid phenylmethyl ester trans isomer in 30 ml. of ethanol and 50 ml. of48% hydrogen bromide was heated at 115° C. for 16 hrs. and then cooledand diluted with 100 ml. water. The solution was extracted with 2×50 ml.of methylene chloride and the aqueous layer was evaporated to dryness.The powder that remained was the product in 82% yield with a meltingpoint of 190°-92° C.

Analysis: Calculated for C₁₀ H₁₃ NO₂ BrCl: C, 40.77; H, 4.45; N, 4.76.Found: C, 41.01; H, 4.46; N, 4.85.

EXAMPLE 11 Trans-3-(4-chlorophenoxy)-4-hydroxy-1-pyrrolidinecarboxamide

A solution of 4.4 g. of 4-(chlorophenoxy)-3-pyrrolidinol and 2.8 g. ofnitrourea in 100 ml. of 90% ethanol was heated at 50° C. for 20 hr. Someof the solvent was removed under vacuum and the remaining slurry wasdiluted with 50 ml. water. The precipitate was filtered, triturated withacetone, filtered and dried. Yield 1.8 g., m.p. 223°-225° C.

Analysis: Calculated for C₁₁ H₁₃ N₂ O₃ Cl: C, 51.47; H, 5.11; N, 10.91.Found: C, 51.18; H, 5.02; N, 10.88.

EXAMPLE 12Trans-3-(4-chlorophenoxy)-4-hydroxy-N,N-dimethyl-1-pyrrolidinecarboxamide

A solution of 3.5 g. of 4-(4-chlorophenoxy)-3-pyrrolidinol, 1.8 g. ofdimethylcarbamyl chloride and 1.7 g. of triethylamine in 300 ml ofmethylene chloride was stirred for 60 hr. The solvent was removed undervacuum, 300 ml of benzene was added and the mixture was refluxed for 2hr., then filtered. After solvent evaporation, the residue was dissolvedin cyclohexane-benzene and charcoaled. The product was thencrystallized, collected by filtration and recrystallized fromcyclohexane-benzene; m.p. 137°-142° C. Analysis: Calculated for C₁₃ H₁₇N₂ O₃ Cl: C, 54.84; H, 6.02; N, 9.84. Found: C, 54.64; H, 6.01; N, 9.77.

EXAMPLE 13Trans-3-(4-chlorophenoxy)-4-hydroxy-N-methyl-1-pyrrolidinecarboxamideHemihydrate

A solution of 0.9 g. of 4-(4-chlorophenoxy)-3-pyrrolidinol in 50 ml. ofmethylene chloride was cooled to 0° C. and 0.24 g. of methyl isocyanatein 5 ml. of methylene chloride was added dropwise over the period of 10min. Cooling was discontinued and stirring was continued for 1 hr.Solvent was then removed and the residue was crystallized fromdimethylsulfoxide-water; m.p. 95 0°-98.5° C.

Analysis: Calculated for C₁₂ H₁₅ N₂ O₃ Cl: C, 51.53; H, 5.77 N, 10.02.Found: C, 51.64; H, 5.79; N, 10.09.

EXAMPLE 14Trans-3-{[(methylamino)carbonyl]oxy}-4-(4-chlorophenoxy)-N,N-dimethyl-1-pyrrolidinecarboxamide

A solution of 1.0 g. (0.003 mole) oftrans-3-(4-chlorophenoxy)-4-hydroxy-N,N-dimethyl-1-pyrrolidinecarboxamideand 1.0 g. (0.02 mole) of methylisocyanate in 20 ml. of methylenechloride was let stand at ambient temperature for 48 hr. The solutionwas concentrated to give an oil which crystallized upon standing. Thesolid was recrystallized from benzene-cyclohexane to yield 0.6 g. (50%)of white solid, m.p. 132°-134° C.

Analysis: Calculated for C₁₅ H₂₀ ClN₃ O₄ : C, 52.71; H, 5.90; N, 12.29.Found: C, 53.09; H, 5.96; N, 12.28.

EXAMPLE 15 Trans-4-(2,6-dichlorophenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 35.0 g. of 1-benzyl-3,4-epoxypyrrolidine and 32.6 g. of2,6-dichlorophenol was heated at 125° C. for 3 hr. The mixture wascooled, dissolved in methylene chloride and extracted with dilute sodiumhydroxide. The residue after the solvent was evaporated was purified bycolumn chromatography. The product was eluted with 30% ethyl acetate inbenzene and crystallized from cyclohexane. Yield was 43 g (64%) m.p.78°-80° C.

Analysis: Calculated for C₁₇ H₁₇ NO₂ Cl₂ : C, 60.37; H, 5.07; N, 4.14.Found: C, 60.42; H, 5.06; N, 4.12.

EXAMPLE 16Trans-3-(2,6-dichlorophenoxy)-4-{phenylmethyl[carbonylbis(oxy)]}-1-pyrrolidinecarboxylicAcid Phenylmethyl Ester

To a solution of 3.4 g. oftrans-1-benzyl-4(2,6-dichlorophenoxy)-3-pyrrolidinol and 1.05 g. oftriethylamine in 25 ml. of benzene was added dropwise a solution of 4.0g. of benzylchloroformate in 20 ml. of benzene. The mixture was stirredfor 30 min. after addition was complete; then filtered and the solventwas evaporated under reduced pressure. The residue was dissolved in 50ml. methylene chloride and 6.0 g. of benzylchloroformate was added. Themixture was stirred overnight; then the solvent was evaporated and theresidue chromatographed on silica gel. The product was eluted with 20%ethyl acetate in benzene and then stirred with petroleum ether until itcrystallized. The white crystals weighed 4.7 g. (90%) and melted at93°-95° C.

Analysis: Calculated for C₂₆ H₂₃ NO₆ Cl₂ : C, 60.48; H, 4.49; N, 2.71.Found: C, 60.61; H, 4.55 N, 2.76.

EXAMPLE 17 Trans-4-(2,6-dichlorophenoxy)-3-pyrrolidinol Hydrobromide

A solution of 12.2 g.3-(2,6-dichlorophenoxy)-4-[phenylmethyl(carbonylbis(oxy))]-1-pyrrolidinecarboxylicacid phenylmethyl ester trans isomer in 120 ml. of ethanol and 140 ml.of 48% hydrogen bromide was stirred at 125° C. for 16 hr. and thencooled and diluted with 300 ml. water. The solution was then extractedwith 2×100 ml. methylene chloride and the aqueous layer was evaporatedto dryness. Trituration with 30% diethylether in isopropyl alcohol gave7.4 g. (95%) of white crystalline hydrobromide; m.p. 192°-5° C.

Analysis: Calculated for C₁₀ H₁₂ NO₂ BrCl₂ : C, 36.51; H, 3.68; N, 4.26.Found: C, 36.49; H, 3.72; N, 4.36.

EXAMPLE 18 Trans-4-(2,3-dichlorophenoxy)-1-phenylmethyl-3-pyrrolidinolHydrochloride

A mixture of 21.5 g. (0.12 mole) of 1-benzyl-3,4-epoxypyrrolidine, 27.8g. (0.17 mole) of 2,3-dichlorophenol and 2 drops of concentratedhydrochloric acid was heated at 120° C. overnight. The dark mixture wasdissolved in methylene chloride and washed with four 100-ml portions of5% sodium hydroxide and once with water. The methylene chloride layerwas dried over anhydrous sodium sulfate-potassium hydroxide andconcentrated to give 35.8 g of dark gum as residue. This gum waschromatographed on 800 g. of silica gel and the product was eluted withan acetone-benzene solution. The appropriate fractions were concentratedto give 25 g. (60%) of an oil. A portion of this oil was converted tothe hydrochloride to yield white solid, m.p. 219°-22° C.

Analysis: Calculated for C₁₇ H₁₈ Cl₃ NO₂ : C, 54.50; H, 4.84; N, 3.74.Found: C, 54.53; H, 4.82; N, 3.53.

EXAMPLE 19Trans-4-(2,3-dichlorophenoxy)-1-[(phenylmethoxy)carbonyl]-3-pyrrolidinol

A mixture of 8.5 g (0.023 mole) oftrans-4-(2,3-dichlorophenoxy)-1-phenylmethyl-3-pyrrolidinolhydrochloride and 100 liters of methyl chloride was cooled and treateddropwise with a solution of 23 g (0.125 mole) of benzylchloroformate in100 ml of methylene chloride. The mixture was stirred at ambienttemperature for 48 hr and then washed successively with water, 2 Nhydrochloric acid, 5% sodium hydroxide and water. The methylene chloridelayer was dried over anhydrous sodium sulfate and then subjected tovacuum distillation at 100°/1.0 mm. to remove the methylene chloride,excess benzylchloroformate and benzyl chloride. An NMR analysis of thepot residue indicated only the oxygen was substituted. An additional 25ml. of benzylchloroformate and 100 ml. of methylene chloride was addedto the residue and the solution stirred at ambient temperature for 48hr. The mixture was purified as above to give 14.6 g. of residue whichwas chromatographed on 300 g. of silica gel. The chromatography gave 5.6g. of the disubstituted compound (See Example 20) and 1.0 g. of thetitled compound as a white solid, m.p. 130°-2° C. (recrystallized frombenzene).

Analysis: Calculated for C₁₆ H₁₇ Cl₂ NO₄ : C, 56.56; H, 4.48; N, 3.67.Found: C, 56.80; H, 4.48; N, 3.67.

EXAMPLE 20Trans-3-(2-dichlorophenoxy)-4-{phenylmethyl[carbonylbis(oxy)]}-1-pyrrolidinecarboxylic acid phenylmethylester

This disubstituted compound resulted from chromatography separation inamount of 5-6 g. in Example 19.

EXAMPLE 21 Trans-4-(2,3-dichlorophenoxy)-3-pyrrolidinol Hydrobromide

A mixture of 5.6 g. (0.011 mole) of3-(2-dichlorophenoxy)-4-{phenylmethyl[carbonylbis(oxy)]}-1-pyrrolidinecarboxylic acid phenylmethylester trans isomer, 60 ml. of ethanol and 70ml. of 48% aqueous hydrogen bromide was heated at 125° C. overnight. Themixture was poured into 150 ml. of water and extracted three times withmethylene chloride. The aqueous solution was concentrated to give anoily residue which crystallized upon standing. The solid was washed withisopropyl alcohol-diethylether, collected by filtration andrecrystallized from isopropyl alcoholdiethylether to yield 1.5 g. (45%)of a pink solid, m.p. 134°-8° C.

Analysis: Calculated for C₁₀ H₁₂ BrCl₂ NO₂ : C, 36.51; H, 3.68; N, 4.26.Found: C, 36.54; H, 3.69; N, 4.32.

EXAMPLE 22 Trans-1-benzyl-4-(3-methylphenoxy)-3-pyrrolidinolHydrochloride

A mixture of 17.5 g. of 1-benzyl-3,4-epoxypyrrolidine and 20 g. ofm-cresol was heated at 115° C. for 18 hr. under nitrogen gas. Aftercooling, the mixture was dissolved in benzene and washed with 5% sodiumhydroxide to remove excess cresol. Stirring with 50 g. of silica gelremoved much of the colored material. The solution was reduced in volumeand some of the residue was converted to the hydrochloride. This saltwas recrystallized from isopropyl alcohol-diethyl ether and melted at163°-165° C.

Analysis: Calculated for C₁₈ H₂₂ NO₂ Cl: C, 67.60; H, 6.93; N, 4.38.Found: C, 67.39; H, 6.97; N, 4.43.

EXAMPLE 23 Trans-4-(3-methylphenoxy)-3-pyrrolidinol Oxalate

A solution of 8.2 g. of 1-benzyl-4-(3-methylphenoxy)-3-pyrrolidinol in150 ml. of ethanol was treated with ca. 0.5 g. of 10%palladium-on-charcoal catalyst and was shaken with hydrogen at 60° C. inthe Parr apparatus for 2 hr. The suspension was cooled, filtered and thesolvent evaporated under vacuum. The base was converted to the oxalatein isopropyl alcohol, filtered and dried. The salt was obtained in 86%yield and melted at 150°-155° C.

Analysis: Calculated for C₁₃ H₁₇ NO₅ : C, 55.12; H, 6.05; N, 4.94.Found: C, 54.75; H, 6.07; N, 5.06.

EXAMPLE 24 Trans-4-(2,3-dimethylphenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 17.5 g. (0.10 mole) of 1-benzyl-3,4-epoxypyrrolidine, 18.3g. (0.15 mole) of 2,3-dimethylphenol and 2 drops of concentratedhydrochloric acid was heated at 120° C. under a nitrogen atmosphereovernight. The reaction mixture was dissolved in methylene chloride andwashed with four 100-ml portions of 5% sodium hydroxide and once withwater. The methylene chloride layer was dried over anhydrous sodiumsulfate-potassium hydroxide and concentrated to give 28.6 g. of dark oilas residue. This oil was chromatographed on 600 g. of silica gel and theproduct was eluted with an acetone-benzene solution. The appropriatefractions were concentrated to give an oil which crystallized uponstanding. This solid was recrystallized from ligroin to give 9.1 g.(31%) of white solid, m.p. 100°-4° C.

Analysis: Calculated for C₁₉ H₂₃ NO₂ : C, 76.74; H, 7.80; N, 4.71.Found: C, 76.92; H, 7.86; N, 4.80.

EXAMPLE 25 Trans-4-(2,3-dimethylphenoxy)-3-pyrrolidinol Hydrobromide

A solution of 9.1 g. (0.031 mole) oftrans-4-(2,3-dimethylphenoxy)-1-phenylmethyl-3-pyrrolidinol in 100liters of ethanol was hydrogenated over 10% palladium-on-charcoal at 50psi and 60° C. until hydrogen uptake ceased. The mixture was filteredthrough Celite and the filtrate was concentrated to give an oil asresidue which solidified upon standing. The solid was converted to thehydrobromide and this salt was recrystallized from isopropylalcohol-ethylacetate-diethylether to yield 4.9 g (55%) of tan needles,m.p. 152°-3° C.

Analysis: Calculated for C₁₂ H₁₈ BrNO₂ : C, 50.01; H, 6.30; N, 4.86.Found: C, 50.29; H, 6.42; N, 4.85.

EXAMPLE 26 Trans-4-(2-methoxyphenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 40 g. of crude 1-benzyl-3,4-epoxypyrrolidine and 70 g. ofguaiacol was heated at 120° C. for 20 hr. Aspirator vacuum was then usedto distill off the excess guaiacol. The residue was dissolved inmethylene chloride and extracted with dilute sodium hydroxide. Themethylene chloride solution was dried over anhydrous sodium sulfate andthe solvent was evaporated. The residue weighed 54 g., waschromatographed on 1 kg. of silica gel. The product was eluted with 50%ethyl acetate in benzene and crystallized from cyclohexane. The m.p. was115°-117° C. and the yield was 27%.

Analysis: Calculated for C₁₈ H₂₁ NO₃ : C, 72.22; H, 7.07; N, 4.68.Found: C, 72.30; H, 7.04; N, 4.70.

EXAMPLE 27 Trans-4-(2-methoxyphenoxy)-3-pyrrolidinol Fumarate

A solution of 11.5 g. of 1-benzyl-4-(o-methoxyphenoxy)-3-pyrrolidinol in200 ml. of ethanol was treated with ca. 2 g. of 10%palladium-on-charcoal catalyst and was shaken with hydrogen at 60° C. inthe Parr reduction apparatus for 5 hr. The suspension was then cooled,filtered, and the solvent evaporated at reduced pressure. The base wasconverted to the fumarate which melted at 158°-160° C. Yield was 9.8 g.(78%).

Analysis: Calculated for C₁₅ H₁₉ NO₇ : C, 55.38; H, 5.89; N, 4.31.Found: C, 55.38; H, 5.89; N, 4.13.

EXAMPLE 28 Trans-4-(4-methoxyphenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 17.5 g. (0.10 mole) of 1-benzyl-3,4-epoxypyrrolidine, 13.4g. (0.11 mole) of p-methoxyphenol, and 3 drops of water was heated on asteam bath overnight. The dark residue was dissolved in methylenechloride and the solution was washed with two 50-ml. portions of 5%sodium hydroxide. The methylene chloride layer was dried over anhydroussodium sulfate and concentrated to give 23.7 g. of viscous dark oil.This oil was chromatographed on 480 g. of silica gel 60 and the productwas eluted with a 1:1 benzene:ether solution. The appropriate fractionswere concentrated to give 10.0 g. of a yellow oil which crystallizedupon scratching. The solid was recrystallized from cyclohexane to yield7.2 g. (24%) tan solid, m.p. 84°-5° C.

Analysis: Calculated for C₁₈ H₂₁ NO₃ : C, 72.22; H, 7.07; N, 4.68.Found: C, 72.20; H, 7.15; N, 4.61.

EXAMPLE 29 Trans-4-(4-methoxyphenoxy)-3-pyrrolidinol Oxalate (3:4)

A solution of 4.0 g. (0.0134 mole) oftrans-4-(4-methoxyphenoxy)-1-phenylmethyl-3-pyrrolidinol in 75 liters ofethanol was hydrogenated over 0.4 g. of 10% Pd/C at 60° C. overnight.The reaction mixture was cooled, filtered through Celite, and thefiltrate concentrated to give the base as a white solid. This solid wasconverted to the oxalate and recrystallized from methanol to yield whiteflakes, m.p. 173°-175° C.d.

Analysis: Calculated for C₄₁ H₅₃ N₃ O₂₅ : C, 52.40; H, 5.68; N, 4.47.Found: C, 52.17; H, 5.62; N, 4.66.

EXAMPLE 30 Trans-4-(2-ethoxyphenoxy)-1-phenylmethyl-3-pyrrolidinol

A mixture of 45.5 g. (0.26 mole) of 1-benzyl-3,4-epoxypyrrolidine (60 g.of 76% epoxide), 48 g. (0.35 mole) of o-ethoxyphenol and 8 drops ofconcentrated hydrochloric acid was heated at 145° C. for 16 hr. Themixture was cooled, dissolved in methylene chloride and washed withdilute sodium hydroxide solution. The methylene chloride layer was driedover anhydrous sodium sulfate and the solvent was removed under reducedpressure. The residue was chromatographed on 1 kg. of silica gel using20% acetone in benzene as the eluent. Two recrystallizations fromcyclohexane gave 8.0 g. (10%) of tan needles, m.p. 88.5°-90.0° C.

Analysis: Calculated for C₁₉ H₂₃ NO₃ : C, 72.82; H, 7.40; N, 4.47.Found: C, 72.64; H, 7.39; N, 4.56.

EXAMPLE 31 Trans-4-(2-ethoxyphenoxy)-3-pyrrolidinol Fumarate

A solution of 7.4 g. (24 mmoles) oftrans-4-(2-ethoxyphenoxy)-1-phenylmethyl-3-pyrrolidinol in 150 ml. ofabsolute ethanol was treated with about 0.5 g. of 10% Pd/C catalyst andwas shaken with hydrogen in the Parr reduction apparatus at 60° C. for1.5 hr. The mixture was cooled and filtered and the filtrate wasconcentrated. The residue (5.3 g., 100%) was converted to the fumaratein isopropyl alcohol to give a white powder; m.p. 173.0°-174.5° C.

Analysis: Calculated for C₁₆ H₂₁ NO₇ : C, 56.63; H, 6.24; N, 4.13.Found: C, 56.60; H, 6.27; N, 4.12.

EXAMPLE 32Trans-4-[4-(phenylmethoxy)phenoxy]-1-phenylmethyl-3-pyrrolidinol

A mixture of 40 g. of 1-benzyl-3,4-epoxypyrrolidine and 42 g. of4-benzoxyphenol was heated at 130° C. for 8 hr. On cooling, the mixturecrystallized. Three crystallizations from petroleum ether-cyclohexanegave fluffy white crystals melting at 98.0°-100.0° C. The yield was 6.0g. (8%).

Analysis: Calculated for C₂₄ H₂₅ NO₃ : C, 76.78; H, 6.71; N, 3.73.Found: C, 76.83; H, 6.82; N, 3.57.

EXAMPLE 33 Trans-4-(4-hydroxyphenoxy)-3-pyrrolidinol Hemioxalate

Six grams of 1-benzyl-4-(4-benzoxyphenoxy)-3-pyrrolidinol in 150 ml. ofethanol was treated with ca. 1 g. of palladium-on-charcoal and shakenunder hydrogen at 60° C. in the Parr apparatus for 3 hr. The mixture wasthen cooled, filtered and the ethanol removed. The oxalate was made inisopropyl alcohol acetone and recrystallized from 90% ethanol. The saltdecomposed at 235° C.

Analysis: Calculated for C₁₁ H₁₄ NO₅ : C, 55.00; H, 5.87; N, 5.83.Found: C, 54.54; H, 5.83; N, 5.65.

EXAMPLE 34Trans-4-(3-trifluoromethylphenoxy)-1-phenylmethyl-3-pyrrolidinol Oxalate

A mixture of 24.0 g. of 1-benzyl-3,4-epoxypyrrolidine and 22.2 g. of3-trifluoromethylphenol was heated at 130° C. for 3 hr. The mixture wascooled, dissolved in methylene chloride and extracted with dilute sodiumhydroxide. The residue after the solvent was evaporated was purified bycolumn chromatography. The product, which was eluted using 30% ethylacetate in benzene weighed 17.7 g. (38%). A small portion when convertedto the oxalate melted at 139°-141° C.

Analysis: Calculated for C₂₀ H₂₀ NO₆ F₃ : C, 56.21; H, 4.72; N, 3.28.Found: C, 56.48; H, 4.77; N, 3.44.

EXAMPLE 35 Trans-4-(3-trifluoromethylphenoxy)-3-pyrrolidinolHydrochloride

A solution of 12.6 g. oftrans-1-benzyl-4-(3-trifluoromethylphenoxy)-3-pyrrolidinol in 200 ml. ofethanol was treated with ca. 2 g. of 10% palladium-on-charcoal catalystand was shaken with hydrogen at 60° C. in the Parr reduction apparatusfor 16 hr. The suspension was cooled, filtered and the solventevaporated at reduced pressure. The residue was dissolved in ether andconverted to the hydrochloride. The yield of product melting at 145°-8°C. was 9.8 g. (93%).

Analysis: Calculated for C₁₁ H₁₃ NO₂ ClF₃ : C, 46.58; H, 4.62; N, 4.94.Found: C, 46.42; H, 4.68; N, 5.07.

EXAMPLE 36Trans-4-[(4-hydroxy-1-phenylmethyl-pyrrolidin-3-yl)oxy]benzamide

A mixture of 28 g. of 1-benzyl-3,4-epoxypyrrolidine and 20.6 g. of4-hydroxybenzamide was heated at 130° C. for 8 hrs. The cooled mixturewas columned on silica gel using 5% methanol in ethyl acetate to elutethe product, which was then crystallized fromchloroform-benzene-methanol. The yield was 19% of product melting at133.0°-6.0° C.

Analysis: Calculated for C₁₈ H₂₀ N₂ O₃ : C, 69.21; H, 6.45; N, 8.97.Found: C, 69.11; H, 6.46; N, 8.82.

EXAMPLE 37 Trans-4-[(4-hydroxy-3-pyrrolidinyl)oxy]benzamide

Eight grams of 4-[(4-benzamide)oxy]-1-benzyl-3-pyrrolidinol was treatedwith ca. 1 g. of 10% palladium-on-charcoal and dissolved in 100 ml. ofethanol and shaken with hydrogen at 60° C. for 4 hr. The suspension wasthen cooled and filtered. The precipitate was washed with hot methanoland the washings combined with the mother liquor. The solvent wasevaporated to 150 ml. and cooled overnight. The product was filtered anddried and melted at 199°-204° C. with decomposition. The yield was 80%.

Analysis: Calculated for C₁₁ H₁₄ N₂ O₃ : C, 59.45; H, 6.35; N, 12.61.Found: C, 59.47; H, 6.45; N, 12.57.

EXAMPLE 38Trans-N-{4-[(4-hydroxy-1-phenylmethyl-3-pyrrolidinly)oxy]phenyl}acetamide

A mixture of 35.0 g. of 1-benzyl-3,4-epoxypyrrolidine, 30.2 g. ofp-acetamidophenol and two drops of water was heated at 125° C. for 3 hr.The mixture was then cooled, dissolved in 50% ethyl acetate in benzeneand washed with dilute sodium hydroxide. When the solvent was removed,the residue weighed 56 g. It was chromatographed using 370 g. of silicagel and the product was eluted with ethyl acetate. After crystallizationfrom 50% ethyl acetate in benzene, the product melted at 130°-32° C. andweighed 26.1 g. (40%).

Analysis: Calculated for C₁₉ H₂₂ N₂ O₃ : C, 69.92; H, 6.79; N, 8.58; O,14.7. Found: C, 69.61; H, 6.69; N, 8.44.

EXAMPLE 39 Trans-N-{4-[(4-hydroxy-3-pyrrolidinyl)oxy]phenyl}acetamideHemifumarate

A solution of 12.4 g. of 1-benzyl-4-(4-acetamidophenoxy)-3-pyrrolidinolin 200 ml. of ethanol was treated with ca. 2 g. of 10%palladium-on-charcoal catalyst and was shaken with hydrogen at 60° C. inthe Parr reduction apparatus for 16 hr. The suspension was then cooled,filtered and the solvent evaporated at reduced pressure. The residueweighed 9 g. and was converted to the fumarate and crystallized fromisopropyl alcohol. The yield of salt was 10.2 g. (90%) which melted at200°-05° C.

Analysis: Calculated for C₁₄ H₁₉ N₂ O₅ : C, 57.14; H, 6.17; N, 9.52.Found: C, 56.90; H, 6.22; N, 9.29.

Example 40 Trans-4-(1-naphthalenyloxy)-1-phenylmethyl-3-pyrrolidinolOxalate

A mixture of 17.5 g. (0.10 mole) of crude 1-benzyl-3,4-epoxypyrrolidine,15.0 g. (0.11 mole) of 1-naphthol and 1 drop of concentratedhydrochloric acid was heated on a steam bath overnight. The dark mixturewas dissolved in methylene chloride and the solution was extracted withthree 50 ml. portions of 5% sodium hydroxide. The methylene chloridelayer was dried over anhydrous sodium sulfate and concentrated to give25.5 g. (80%) of black gum as residue. This residue was chromatographedon 500 g. of silica gel and the product was eluted with 1:1 ethylether;benzene to give 9.9 g. (31%) of white solid, m.p. 106-8° C. whenrecrystallized from cyclohexane.

Analysis: Calculated for C₂₁ H₂₁ NO₂ : C, 79.97; H, 6.63; N, 4.39.Found: C, 79.08; H, 6.67; N, 4.45.

The oxalate was prepared as a white solid, m.p. 190-2° C. whenrecrystallized from nitromethane.

Analysis: Calculated for C₂₃ H₂₃ NO₆ : C, 67.47; H, 5.66; N, 3.42.Found: C, 67.00; H, 5.68; N, 3.57.

Example 41 Trans-4-(1-naphthalenyloxy)-3-pyrrolidinol

Eighteen grams of 1-benzyl-4-(1-naphthoxy)-3-pyrrolidinol in 200 ml. ofethanol was treated with ca. 2 g. of 10% palladium-on-charcoal underhydrogen at 60° C. for 20 hr. The mixture was cooled, filtered andethanol removed. The residue was crystallized from benzene and had amelting point of 112°-115° C.

Analysis: Calculated for C₁₄ H₁₅ NO₂ : C, 73.34; H, 6.59; N, 6.11.Found: C, 73.39; H, 6.64; N, 5.90.

Example 42Trans-4-[1H-2,3-dihydroinden-4-yl)oxy]-1-phenylmethyl-3-pyrrolidinol

A mixture of 28 g. of 1-benzyl-3,4-epoxypyrrolidine and 20.1 g. of4-indanol was heated at 130° C. for 8 hr. The residue waschromatographed on silica gel using ethyl acetate to elute the product.The yield of product after crystallization from cyclohexane was 6%,melting at 98°-101° C.

Analysis: Calculated for C₂₀ H₂₃ NO₂ : C, 77.64; H, 7.49; N, 4.53.Found: C, 77.41; H, 7.52; N, 4.37.

Example 43 Trans-4-[1H-2,3-dihydroinden-4-yl)oxy]-3-pyrrolidinolHydrochloride

1-Benzyl-4-(4-indanoxy)-3-pyrrolidinol (2.7 g.) in 100 ml. of ethanoltreated with ca. 0.5 g. 10% palladium-on-charcoal and was shaken withhydrogen at 60° C. in the Parr apparatus for 5 hr. The suspension wasthen cooled, filtered and the solvent removed. The residue was convertedto the hydrochloride in ether and dried for 18 hr. at 40° C. undervacuum. The yield of product melting at 174°-180° C. was 91%.

Analysis: Calculated for C₁₃ H₁₆ NO₂ Cl: C, 61.06; H, 7.09; N, 5.48.Found: C, 60.80; H, 7.16; N, 5.46.

Example 44Trans-4-[(1,2-dihydroinden-5yl)oxy]-1-phenylmethyl-3-pyrrolidinolHydrochloride

A mixture of 35 g. of 1-benzyl-3,4-epoxypyrrolidine and 28 g. of5-indanol was heated at 130° C. for 3 hr. The mixture was then cooled,dissolved in methylene chloride and extracted with dilute sodiumhydroxide. After solvent evaporation the residue was columned on silicagel, and the product was eluted with 50% ethyl acetate in benzene. Thehydrochloride salt was formed in ether and was recrystallized fromethanol-acetone. The yield of salt melting at 153-5° C. was 12.3 g.(18%).

Analysis: Calculated for C₂₀ H₂₄ NO₂ Cl: C, 69.45; H, 6.99; N, 4.05.Found: C, 69.13; H, 6.93; N, 3.99.

Example 45 Trans-4[(2,3-dihydro-1H-inden-5-yl)oxy]-3-pyrrolidinolOxalate

A solution of 6.0 g. of 1-benzyl-4-(5-indanoxy-3-pyrrolidinol in 100 ml.of ethanol was treated with ca. 0.5 g. 10% palladium-on-charcoal and wasshaken with hydrogen at 60° C. in the Parr apparatus for 3 hr. Thesuspension was then cooled, filtered, and the solvent removed. Theoxalate was prepared in isopropyl alcohol and melted at 179.0°-181.0° C.

Analysis: Calculated for C₁₅ H₁₉ NO₆ : C, 58.25; H, 6.19; N, 4.53.Found: C, 58.13; H, 6.14; N, 4.58.

Example 46 Trans-1-ethyl-4-phenoxy-3-pyrrolidinol Oxalate Hydrate (4:1)

A mixture of 22.6 g. of 1-ethyl-3,4-epoxypyrrolidine and 18.6 g. ofphenol was heated at 150° C. for 0.5 hr., and then distilled. Theproduct boiled at 120°/0.025 mm. The yield of pure product was 25.0 g.(60%). A portion of the base was converted to the oxalate which meltedat 134-7° C. after it was recrystallized from isopropyl alcohol.

Analysis: Calculated for C₅₆ H₇₈ N₄ O₂₅ : C, 55.72; H, 6.51; N, 4.64.Found: C, 55.83; H, 6.38; N, 4.63.

Example 47 Trans-1-ethyl-4-phenoxy-3-pyrrolidinolmethylcarbamate Ester

A solution of 6.5 g. of 1-ethyl-4-phenoxy-3-pyrrolidinol and 1.9 g. ofmethyl isocyanate in 80 ml. of benzene was allowed to stand undernitrogen gas for 5 days. The crystalline solid remaining on evaporationof the benzene was recrystallized from cyclohexane. The yield of productmelting at 88°-94° C. was 6.5 g. (79%).

Analysis: Calculated for C₁₄ H₂₀ N₂ O₃ : C, 63.62; H, 7.63; N, 10.60.Found: C, 63,61; H, 7.60; N, 10.62.

Example 48 Trans-4-(2-chlorophenoxy)-1-ethyl-3-pyrrolidinolHydrochloride

A mixture of 17.0 g. (0.15 mole) of 1-ethyl-3,4-epoxypyrrolidine, 20.5g. (0.16 mole) of o-chlorophenol and 3 drops concentrated hydrochloricacid was heated on a steam both overnight. The oil was dissolved inmethylene chloride and washed with three 50-ml. portions of 5% sodiumhydroxide and one 50-ml. portion of water. The methylene chloridesolution was dried over anhydrous sodium sulfate, concentrated andchromatographed on silica gel to give 8.9 g. (25%) of an oil as residue.The oil was converted to the hydrochloride and recrystallized from ethylacetate-acetonitrile to yield white powder, m.p. 108°-110° C.

Analysis: Calculated for C₁₂ H₁₇ Cl₂ NO₂ : C, 51.81; H, 6.16; N, 5.04.Found: C, 51.65; H, 6.17; N, 5.09.

Example 49 Trans-4-(2,6-dichlorophenoxy)-1-ethyl-3-pyrrolidinolHydrochloride

A mixture of 11.3 g. (0.10 mole) of 1-ethyl-3,4-epoxypyrrolidine, 18.0g. (0.11 mole) of 2,6-dichlorophenol and 2 drops concentratedhydrochloric acid was heated on a steam bath overnight. The oil wasdissolved in methylene chloride and washed with three 50-ml. portions of5% sodium hydroxide and one 50-ml. portion of water. The methylenechloride solution was dried over anhydrous sodium sulfate, concentratedand chromatographed on silica gel to give 12.9 g. (47%) of an oilresidue. The oil was converted to the hydrochloride ad recrystallizedfrom isopropyl alcohol-diethyl ether to yield 12.3 g. (39%), m.p.160°-162° C.

Analysis: Calculated for C₁₂ H₁₆ Cl₃ NO₂ : C, 46.10; H, 5.16; N, 4.48.Found: C, 46.10; H, 5.20; N, 4.48.

Example 50 Trans-1-ethyl-4-(3-methylphenoxy)-3-pyrrolidinol OxalateHemihydrate

A mixture of 17 g. of 1-ethyl-3,4-epoxypyrrolidine and 16.2 g. ofm-cresol was heated at 125° C. for 45 min. and then vacuum distilled.The yield of product boiling at 135° C./0.02 mm was 37%. This wasconverted to the oxalate which melted at 116°-119° C.

Analysis: Calculated for C₃₀ H₄₄ N₂ O₁₃ : C, 56.24; H, 6.92; N, 4.37.Found: C, 56.66; H, 6.68; N, 4.15.

Example 51 Trans-4-(2-ethoxyphenoxy)-1-ethyl-3-pyrrolidinol

A mixture of 17.0 g. (0.15 mole) of 1-ethyl-3,4-epoxypyrrolidine, 22.1g. (0.16 mole) of o-ethoxyphenol and 3 drops of concentratedhydrochloric acid was heated on a steam bath overnight. The oil wasdissolved in methylene chloride and washed with three 50-ml. portions of5% sodium hydroxide and one 50-ml. portion of water. The methylenechloride solution was dried over anhydrous sodium sulfate, concentratedand chromatographed on silica gel to give 8.1 g. (21%) of an oil whichcrystallized on standing. The solid was recrystallized from cyclohexaneto yield a tan solid, m.p. 73°-75° C.

Analysis: Calculated for C₁₄ H₂₁ NO₃ : C, 66.90; H, 8.42; N, 5.57;Found: C, 66.49; H, 8.43; N, 5.48.

Example 52Trans-1-{4-[(1-ethyl-4-hydroxy-3-pyrrolidinyl)oxy]-3-methoxyphenyl}ethanoneSesquioxalate

A mixture of 17.0 g. (0.15 mole) of acetovanillone and1-ethyl-3,4-epoxypyrrolidine and 3 drops of water was heated on a steambath overnight. The mixture was dissolved in 250 ml. of methylenechloride and extracted with three 150-ml. portions of 5% sodiumhydroxide and one 100-ml. portion of water. The methylene chloride layerwas dried over anhydrous sodium sulfate and concentrated to give 19.0 g.crude oil. This oil was chromatographed on 400 g. of silica gel. Thedesired product was eluted with acetone. The fractions were concentratedto give 14.0 g. of oil which was treated with oxalic acid in isopropylalcohol. The resulting white solid was recrystallized twice fromisopropyl alcohol to yield 13.4 g. (24%) of sesquioxalate, m.p. 121-3°C.

Analysis: Calculated for C₁₆ H₂₄ NO₁₀ : C, 52.17; H, 5.84; N, 3.38.Found: C, 52.45; H, 5.90; N, 3.60.

Example 53 Trans-1-ethyl-4-[2-(2-propenyl)phenoxy]-3-pyrrolidinolOxalate

A mixture of 17.0 g. of 1-ethyl-3,4-epoxypyrrolidine and 20.0 g. of2-allylphenol was heated at 130° C. for 1.5 hr. then cooled andchromatographed on silica gel, using 20% methanol in ethyl acetate toelute the product. A portion of the total yield, 18.5 g. (50%) wasconverted to the oxalate which melted at 142-5° C.

Analysis: Calculated for C₁₇ H₂₃ NO₆ : C, 60.52; H, 6.87; N, 4.15.Found: C, 60.30; H, 6.79; N, 3.98.

Example 54 Trans-1-ethyl-4-[2-(2-propenyl)phenoxy]-3-pyrrolidinolethylcarbamate (ester)

A mixture of 7.3 g. of trans 4-(2-allylphenoxy)-1-ethyl-3-pyrrolidinoland 2.5 g. of ethylisocyanate in 30 ml. of benzene was stirred for 48hr. The benzene was replaced by petroleum ether and the solutionchilled. The yield of precipitate melting at 53-6° C. was 78%.

Analysis: Calculated for C₁₈ H₂₆ N₂ O₃ : C, 67.90; H, 8.23; N, 8.80.Found: C, 67.91; H, 8.08; N, 8.79.

Example 55 Trans-1-ethyl-4-(1-naphthalenyloxy)-3-pyrrolidinolHydrochloride

A mixture of 22.6 g. of 3,4-epoxy-1-ethylpyrrolidine and 28.8 g. of1-naphthol was heated to 130° C. for 1 hr. The mixture was cooled,dissolved in benzene and extracted with dilute sodium hydroxide. Thebenzene was evaporated and the residue was chromatographed on silicagel, eluting the product with 40% methanol in ethyl acetate. Thehydrochloride of the product was made and recrystallized fromethanol-acetone. The yield of salt melting at 206-7° C. was 17.5 g.(30%).

Analysis: Calculated for C₁₆ H₂₀ NO₂ Cl: C, 65.41; H, 6.86; N, 4.77.Found: C, 65.29; H, 6.93; N, 4.70.

Example 56Trans-1-ethyl-4-[(1H-2,3-dihydroinden-4-yl)oxy]-3-pyrrolidinol

A mixture of 17 g. of 1-ethyl-3,4-epoxypyrrolidine and 20 g. of4-indanol was heated at 125° C. for 1 hr. then cooled and dissolved inethyl acetate and chromatographed on silica gel, using 25% methanol inethyl acetate to elute the product. The yield of product melting at87°-90° C. after recrystallization from cyclohexane was 15 g. (40%).

Analysis: Calculated for C₁₅ H₂₁ NC₂ : C, 72.84; H, 8.56; N, 5.66.Found: C, 72.92; H, 8.52; N, 5.48.

Example 57Trans-1-ethyl-4-[(1H-2,3-dihydroinden-5-yl)oxy]-3-pyrrolidinol Maleate

A mixture of 15.0 g. (0.132 mole) of 1-ethyl-3,4-epoxypyrrolidine, 20 g.(0.15 mole) of 5-indanol and 1 drop of water was heated on a steam bathovernight. The oil eas dissolved in methylene chloride and washed withthree 50-ml. portions of 5% sodium hydroxide and one 50-ml. portion ofwater. The methylene chloride was dried over anhydrous sodium sulfateand concentrated to give 28.5 g. of a dark residue. This residue waschromatographed on 500 g. of silica gel and the product was eluted withmethanol. This oil was converted to the maleate to yield 16.6 g. (35%)of cream colored needles, m.p. 147-8° C.

Analysis: Calculated for C₁₉ H₂₅ NO₆ : C, 62.80; H, 6.93; N, 3.85.Found: C, 62.74; H, 6.88; N, 3.83.

Example 58 Trans-1-cyclohexyl-4-phenoxy-3-pyrrolidinol Compound withCyclohexane-sulfamic Acid

A mixture of 33.5 g. (0.2 mole) of N-cyclohexyl-3,4-epoxypyrrolidine,18.8 g. (0.02 mole) of phenol and 2 drops concentrated hydrochloric acidwas heated on a steam bath overnight. The reaction mixture was dissolvedin methylene chloride and washed with three 100-ml portions of 5% sodiumhydroxide and once with 100 ml. of water and dried over potassiumhydroxide-anhydrous sodium sulfate. The methylene chloride solution wasconcentrated to give 36.4 g. of oil as residue. The oil partiallycrystallized and the solid was washed with petroleum ether, collected byfiltration and recrystallized from cyclohexane to give 11.0 g. (21%) ofa white solid. This solid was converted to the hexamate to yield whiteneedles, m.p. 163-5° C., recrystallized from isopropyl alcohol.

Analysis: Calculated for C₂₂ H₃₆ N₂ O₅ S: C, 59.97; H, 8.24 N, 6.36.Found: C, 59.99; H, 8.29; N, 6.30.

Example 59 Cis-4-phenoxy-1-phenylmethyl-3-pyrrolidinol

A slurry of 2.4 g. (0.1 mole) of sodium hydride (4.2 g. of 57% oildispersion, washed with ether to remove the oil) in 30 ml. ofdimethylformamide was stirred while a solution of 19.3 g. (0.1 mole) of1-benzyl-3,4-dihydroxypyrrolidine, cis isomer, (I) in 30 ml. ofdimethylformamide was added dropwise. The mixture was heated at 50° C.for 1 hr., then a solution of 19.2 g. (0.2 mole) of fluorobenzene in 30ml. of dimethylformamide was added in one portion. The mixture washeated at 90° C. for 18 hr., then cooled and concentrated under vacuum.The residue was dissolved in benzene and washed with water. Thesemicrystalline residue from the concentrated organic fraction wasdissolved in cyclohexane and the solution was decanted from an insolubleoil (mostly I). The cyclohexane solution was treated with charcoal toremove residual I and then crystallized as fluffy, off-white needles(m.p. 88.5°-90° d.) which weighed 1.2 g. (4.5%).

Analysis: Calculated for C₁₇ H₁₉ NO₂ : C, 75.81; H, 7.11; N, 5.20.Found: C, 75.88; H, 7.27; N, 5.16.

Example 60 Cis-4-(3-chlorophenoxy)-1-phenylmethyl-3-pyrrolidinol

A slurry of 1.2 g. (50 mmoles) of sodium hydride (2.1 g. of 57% oildispersion, washed with ether to remove the oil) in 25 ml. of dimethylsulfoxide was stirred while 9.6 g. (50 mmoles) of1-benzyl-3,4-dihydroxypyrrolidine, cis isomer, in 25 ml. of dimethylsulfoxide was added. The mixture was stirred at ambient temperature forone hr., then 50 ml. of dimethyl sulfoxide was added and the temperaturewas raised to 95° C. for 0.5 hr. Mechanical stirring of the thick slurrywas necessary while 13 g. (100 mmoles) of m-chlorofluorobenzene wasadded. During the heating period of 1 hr. at 95° C., all precipitatedissolved. The reaction mixture was concentrated by vacuum distillationof the dimethyl sulfoxide and excess m-chlorofluorobenzene. The residuewas poured into water and extracted with hot cyclohexane. The organicextracts were combined, dried over anhydrous sodium sulfate andconcentrated to give 7.5 g. (49%) of off-white crystals, m.p. 86°-87.5°C.

Analysis: Calculated for C₁₇ H₁₈ ClNO₂ : C, 67.21; H, 5.97; N, 4.61.Found: C, 67.33; H, 6.00; N, 4.56.

Example 61Cis-3-(3-chlorophenoxy)-4-hydroxy-1-methyl-1-phenylmethylpyrrolidiniumIodide

A mixture of 15.2 g. (0.05 mole) ofcis-4-(3-chlorophenoxy)-1-phenylmethyl-3-pyrrolidinol and 56 g. (0.4mole) of methyl iodide was heated at reflux for 60 hr. Excess methyliodide was removed under vacuum. The pasty residue was washed withether-acetone, leaving 13 g. (59%) of granular tan powder, m.p. 118-25°C.

Analysis: Calculated for C₁₈ H₂₁ ClINO₂ : C, 48.51; H, 7.75; N, 3.14.Found: C, 48.27; H, 4.75; N, 3.19.

Example 62 Cis-1-methyl-4-phenoxy-3-pyrrolidinol

A solution of 12.5 g. (28 mmoles) ofcis-3-(3-chlorophenoxy)-4-hydroxy-1-methyl-1-phenylmethylpyrrolidiniumiodide in 400 ml. of ethanol was stirred at 45° C. with 3.5 g. (15mmoles) of silver oxide for 1 hr. The solids were removed by filtrationand the filtrate was concentrated to 100 ml., treated with 0.5 g. of 10%palladium-on-charcoal catalyst and was shaken under hydrogen at 60° C.for 3 hr. The mixture was cooled and the catalyst was collected byfiltration. The filtrate was concentrated and the residue was treatedwith dilute sodium hydroxide and extracted into methylene chloride. Thesolution was concentrated and redissolved in hot cyclohexane, treatedwith charcoal, separated by filtration through Celite and recrystallizedfrom cyclohexane to give 4.6 g. (85%) of white needles (m.p. 78°-81°C.).

Analysis: Calculated for C₁₁ H₁₅ NO₂ : C, 68.37; H, 7.82; N, 7.25.Found: C, 68.42; H, 7.87; N, 7.19.

Example 63 Cis-4-phenoxy-3-pyrrolidinol cis isomer Hydrochloride Hydrate(4:1)

A solution of 16.0 g. (53 mmoles) ofcis-4-(3-chlorophenoxy)-1-phenylmethyl-3-pyrrolidinol in 100 ml. ofabsolute ethanol and 5 ml. concentrated hydrochloric acid was treatedwith 0.5 g. of 10% palladium-on-charcoal catalyst and was shaken underhydrogen at 60° C. for 16 hr. The mixture was cooled and the catalystwas separated by filtration through Celite. The filtrate wasconcentrated and the white crystalline residue was triturated withether-acetone. Weight of white powder, 9.8 g. (86%), m.p. 128-37° C. wasobtained.

Analysis: Calculated for C₄₀ H₅₈ Cl₄ N₄ O₉ : C, 54.55; H, 6.64; N, 6.36.Found: C, 54.26; H, 6.41; N, 6.27.

Formulation and Administration

Effective quantities of any of the foregoing pharmacologically activecompounds of Formula I may be administered to a living animal body fortherapeutic purposes according to usual modes of administration and inusual forms, such as orally in solutions, emulsions, suspensions, pills,tablets and capsules in pharmaceutically acceptable carriers andparenterally in the form of sterile solutions.

For the parenteral administration the carrier or excipient may be asterile, parenterally acceptable liquid; e.g., water or a parenterallyacceptable oil; e.g., arachis oil contained in ampules.

Although very small quantities of the active materials of the presentinvention are effective when minor therapy is involved or in cases ofadministration to subjects having a relatively low body weight, unitdosages are usually from five milligrams or above and preferably 25, 50,or 100 milligrams or even higher, depending, of course, upon theemergency of the situation and the particular result desired. Five to 50milligrams appears optimum per unit dose or usual broader ranges appearto be 1 to 500 milligrams per unit dose. Daily dosages should preferablyrange from 10 mg. to 100 mg. The active ingredients of the invention maybe combined with other pharmacologically active agents as stated above.It is only necessary that the active ingredient constitute an effectiveamount, i.e., such that a suitable effective dosage will be obtainedconsistent with the dosage form employed. Obviously, several unit dosageforms may be administered at about the same time. The exact individualdosages as well as daily dosages will, of course, be determinedaccording to standard medical principles under the direction of aphysician or veterinarian.

The following formulations are representative for all of thepharmacologically active compounds of this invention. cl FORMULATIONS

1. Capsules

Capsules of 5 mg., 10 mg., 25 mg., and 50 mg. of active ingredient percapsule are prepared. With the higher amounts of active ingredient,reduction may be made in the amount of lactose.

    ______________________________________                                        Typical blend for encapsulation                                                                  Per Capsule, mg.                                           ______________________________________                                        Active ingredient, as salt                                                                       5                                                          Lactose            259                                                        Starch             126                                                        Magnesium stearate 4                                                          Total              394                                                        ______________________________________                                    

Additional capsule formulations preferably contain a higher dosage ofactive ingredient and are as follows:

    ______________________________________                                                      100        250      500                                                       mg. per    mg. per  mg. per                                     Ingredients   Capsule    Capsule  Capsule                                     ______________________________________                                        Active ingredient,                                                                          100        250      500                                         as salt                                                                       Lactose       214        163      95                                          Starch        87         81       47                                          Magnesium stearate                                                                          4          6        8                                           Total         399        500      650                                         ______________________________________                                    

In each case, uniformly blend the selected active ingredient withlactose, starch, and magnesium stearate and encapsulate the blend.

2. Tablets

A typical formulation for a tablet containing 5.0 mg. of activeingredient per tablet follows. The formulation may be used for otherstrengths of active ingredient by adjustment of weight of dicalciumphosphate.

    ______________________________________                                                          Per Tablet, mg.                                             ______________________________________                                        1.       Active ingredient                                                                            5.0                                                   2.       Corn starch    15.0                                                  3.       Corn starch (paste)                                                                          12.0                                                  4.       Lactose        35.0                                                  5.       Dicalcium phosphate                                                                          132.0                                                 6.       Calcium stearate                                                                             2.0                                                            Total          202.0                                                 ______________________________________                                    

Uniformly blend 1, 2, 4 and 5. Prepare 3 as a 10 percent paste in water.Granulate the blend with starch paste and pass the wet mass through an 8mesh screen. The wet granulation is dried and sized through a 12 meshscreen. The dried granules are blended with the calcium stearate andcompressed.

    ______________________________________                                        3.     Injectable - 2% sterile solution                                                                 Per cc                                              Active ingredient   mg.                                                                             20                                                      Preservative, e.g.    0.5                                                     chlorobutanol, wt./vol. percent                                               Water for injection q.s.                                                      ______________________________________                                    

Prepare solution, clarify by filtration, fill into vials, seal andautoclave.

Various modifications and equivalents will be apparent to one skilled inthe art and may be made in the compounds, compositions and methods ofthe present invention without departing from the spirit or scopethereof, and it is therefore understood that the invention is to belimited only by the scope of the appended claims.

What is claimed:
 1. A method of treating depression in animals whichcomprises administering to said animal an effective amount of atrans-4-(2-chlorophenoxy)-1-ethyl-3-pyrrolidinol and thepharmaceutically acceptable acid addition salts thereof. 2.Trans-4-(2-chlorophenoxy)-1-ethyl-3-pyrrolidinol and thepharmaceutically acceptable addition salts thereof.
 3. A pharmaceuticalcomposition comprising trans-4-(2-chlorophenoxy)-1-ethyl-3-pyrrolidinoland the pharmaceutically acceptable addition salts thereof and apharmaceutical carrier therefor.